diff --git a/tools/rankserver/app.py b/tools/rankserver/app.py
index dd320b5..e3a5ecb 100644
--- a/tools/rankserver/app.py
+++ b/tools/rankserver/app.py
@@ -95,7 +95,7 @@ if __name__ == "__main__":
     conf = json.loads(open(CONFIG_DIR + '/rankserver.json', 'r').read())
 
     app = make_app()
-    app.listen(conf['listen_port'] + 1)
+    app.listen(conf['listen_port'])
     conf['rushtime'] = 300
 
     tornado.ioloop.IOLoop.current().call_later(conf['rushtime'],